Method for transmitting uplink control information

ABSTRACT

Embodiments of the present disclosure provide a method for transmitting uplink control information. The method includes: a User Equipment (UE) receives Uplink Control Information UCI configuration information, wherein the UCI configuration information includes information for determining a periodicity, an offset and a Physical Uplink Control Channel PUCCH for Periodic-Channel State Information P-CSI to be report in one subframe and configuration information for transmission of Hybrid Automatic Retransmission reQuest-Acknowledgement HARQ-ACK; processes one or more kinds of UCI in the subframe, and transmits the UCI on resources using a PUCCH format. According to the method of the present disclosure, the transmit power for transmitting the UCI on the channel using the PUCCH format is optimized. During the transmission of the P-CSI, the PUCCH resource most preferable for the transmission of the P-CSI is determined. The uplink resource utilization ratio is increased.

PRIORITY

This application is a Continuation of U.S. application Ser. No.15/738,048 which was filed in the U.S. Patent and Trademark Office onDec. 19, 2017, which is a National Phase Entry of PCT InternationalApplication No. PCT/KR2016/006503 which was filed on Jun. 20, 2016, andclaims priority to Chinese Patent Application Nos. 201510347835.9,201510498514.9, 201510612317.5, and 201510666982.2, which were filed onJun. 19, 2015, Aug. 13, 2015, Sep. 23, 2015, and Oct. 15, 2015,respectively, the content of each of which is incorporated herein byreference.

TECHNICAL FIELD

The present disclosure relates to wireless communication systems, andmore particularly, to a method for transmitting uplink controlinformation.

BACKGROUND ART

In LTE systems, multiple Component Carriers (CCs) may be aggregated toobtain a wider bandwidth acting as an uplink and a downlink of acommunication system, i.e., Carrier Aggregation (CA) technique, so as tosupport higher transmission rate. At present, various kinds of CAtechniques are supported. The aggregated cells may be all FDD cells, ormay be all TDD cells with the same uplink-downlink configuration, or maybe all TDD cells with different uplink-downlink configurations. Inaddition, aggregation of TDD cell and FDD cell is also supported and theuplink-downlink configuration of the TDD cell may be semi-staticallyconfigured or dynamically changed. For a UE, if the CA mode isconfigured, one cell is a Primary Cell (Pcell) and other cells areSecondary Cells (Scell). According to the method of LTE, for each cell,downlink data is transmitted based on Hybrid Automatic RetransmissionreQuest (HARQ) scheme. Accordingly, the UE needs to feed back HARQ-ACKinformation of multiple cells. The UE also needs to feed back CSI ofmultiple cells.

In the LTE system. Physical Uplink Control Channel (PUCCH) format 3 issupported at present. According to PUCCH format 3, a joint coding isperformed to multiple HARQ-ACK bits from, e.g., multiple configuredcells, and the coded bits are mapped to a physical channel fortransmission. The PUCCH format 3 supports the transmission of up to 22bits. According to the LTE, when it is required to feed back UplinkControl Information (UCI) in the Physical Uplink Shared Channel (PUSCH),different processing methods are adopted for different kinds of UCI. Forexample, FIG. 1 shows an example of multiplexing of HARQ-ACK, RankIndicator (RI) and Channel Quality Indicator/Precoding Matrix Indicator(CQI/PMI) on the PUSCH. After coding and rate matching, the CQI/PMIinformation is mapped using a method similar as uplink data, i.e., usinga time preferred mapping method. The HARQ-ACK information is mapped tofour symbols adjacent to DMRS and the mapping method has a reversefrequency direction compared to the CQI/PMI. As such, if the HARQ-ACKinformation needs to occupy more Resource Elements (REs), the HARQ-ACKinformation may occupy the REs used by the CQI/PMI, so as to ensure thetransmission of the more important HARQ-ACK information. Similar as theHARQ-ACK information, the RI information is mapped to symbols adjacentto the HARQ-ACK information and its mapping method also has a reversefrequency direction compared to the CQI/PMI. Thus, when the RIinformation needs to occupy more REs, the RI information may occupy theREs of the CQI/PMI, so as to ensure the transmission of the moreimportant RI information.

According to the current LTE specifications, as to the Periodic CSI(P-SCI) feedback, the periodicity, subframe offset and occupied PUCCHfor the P-SCI are configured respectively for each cell. For a cellconfigured with multiple CSI processes, periodicity and subframe offsetmay be respectively configured for the P-CSI of each CSI process. Butall CSI processes of the same cell use the same PUCCH. Thus, if multipleP-CSI need to be transmitted in one subframe, the UE only transmits theP-CSI with the highest priority and drops other P-CSI with lowerpriorities. In the current LTE specifications, parameters used fordetermining the priority of the P-CSI are as follows in a descendingorder of their priorities: CSI report type, CSI process ID, cell ID andCSI subframe set index. In particular, the CSI report types are comparedfirst. If the CSI report types are the same, the CSI process IDs arecompared. If the CSI process IDs are also the same, the cell IDs arecompared. If the cell IDs are the same, the CSI subframe set indexes arecompared.

According to the current LTE specifications, for cell c, the transmitpower for the PUCCH transmission in subframe i is defined by:

${{P_{PUCCH}(i)} = {\min\begin{Bmatrix}{{P_{{CMAX},c}(i)},} \\{P_{0{\_ PUCCH}} + {PL}_{c} + {h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} +} \\{{\Delta_{F\_ PUCCH}(F)} + {\Delta_{TxD}\left( F^{\prime} \right)} + {g(i)}}\end{Bmatrix}({dBm})}},$

wherein definitions of the parameters in the above formula may be seenfrom 3GPP specification 36.213, section 5.1.2.1 and are brieflydescribed as follows: P_(CMAX,c)(i) is a configured maximum UE transmitpower in subframe i for cell c; Δ_(F_PUCCH)(F) is a power offsetrelative to a reference format (in the LTE, the reference format isPUCCH format 1a); Δ_(TxD)(F′) corresponds to a PUCCH format and isrelevant to whether transmission diversity is adopted; PL_(C) denotespath loss; P_(0_PUCCH) is a power offset configured by higher layersignaling; g(i) is an accumulative value of closed loop power control;h(n_(CQI),n_(HARQ),n_(SR)) denotes a power offset relative to PUCCHformat and the number of UCI bits to be fed back, n_(CQI) denotes thenumber of CSI bits to be fed back in subframe i; n_(HARQ) denotes thenumber of effective HARQ-ACK bits actually transmitted in subframe i.For example, for PUCCH format 3, when CSI is to be fed back,

${h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} = {\frac{n_{HARQ} + n_{SR} + n_{CQI} - 1}{3}.}$

At present, 3GPP is working on the standardization of enhanced CAtechnique which may aggregate more cells. For example, the number ofaggregated cells may reach 32. At this time, for a UE, the configuredcells may be divided into multiple groups or put in only one group. Foreach group, UCI is fed back on the PUCCH of a cell of the group. Thecell used for feeding back the UCI is similar to the Pcell in thecurrent CA technique. Herein, the number of cells in each group mayexceed the maximum number of aggregated cells supported by the currentCA technique. Since the number of cells whose UCI needs to be fed backon the PUCCH of a cell increases, the amount of HARQ-ACK information andCSI need to be fed back on the PUCCH inevitably increase, e.g., morethan 22 bits. In fact, the UCI transmitted by the UE in the uplink mayfurther include Scheduling Request (SR), and the CSI may be furtherdivided into Periodic CSI (P-CSI) and Aperiodic CSI (A-CSI).

DISCLOSURE OF INVENTION Technical Problem

Accordingly, in order to support the transmission of the UCI exceeding22 bits, a new PUCCH format is required. This format may be completelynew or may be obtained by modifying current PUCCH format 3. PUSCH orother channel structures. Hereinafter, both of them are referred to asPUCCH format X. The introducing of the PUCCH format X has brought out aseries of impacts. Therefore, the transmission method of the UCI needsto be designed accordingly.

Solution to Problem

Embodiments of the present disclosure provide a method for transmittinguplink control information. The technical solution of the presentdisclosure is as follows.

A method for transmitting uplink control information, including:

receiving, by a User Equipment UE, configuration information for UplinkControl Information UCI, wherein the UCI configuration informationincludes information for determining a periodicity, an offset and aPhysical Uplink Control Channel PUCCH for Periodic-Channel StateInformation P-CSI to be report in one subframe and configurationinformation for transmission of Hybrid Automatic RetransmissionreQuest-Acknowledgement HARQ-ACK; and

processing, by the UE, one or more kinds of UCI in the subframe, andtransmitting the UCI on resources using a PUCCH format.

According to the method of the present disclosure, the transmit powerfor the transmission of the UCI on the PUCCH is optimized. Meanwhile,during the transmission of the P-CSI, the PUCCH resource which ispreferable for transmitting the P-CSI is determined. As such, the uplinkresource utilization ratio is increased.

Advantageous Effects of Invention

Embodiments of the present disclosure provide a method for transmittinguplink control information in order to support the transmission of theUCI exceeding 22 bits.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram illustrating mapping of UCI on the PUSCHin the LTE system.

FIG. 2 is a flowchart illustrating a method for transmitting UCI onPUCCH using format X according to an embodiment of the presentdisclosure.

FIG. 3 is a schematic diagram illustrating independent coding andmapping of different categories of UCI according to an embodiment of thepresent disclosure.

FIG. 4 is a schematic diagram illustrating an apparatus for transmittinguplink control information according to an embodiment of the presentdisclosure.

MODE FOR THE INVENTION

The present disclosure will be described in further detail hereinafterwith reference to accompanying drawings and embodiments to make theobjective, technical solution and merits therein clearer.

For a UE, the UCI of all cells may be fed back on the PUCCH of thePcell. Or, the UE configured cells may be divided into groups and theUCI of each group is fed back on the PUCCH of a selected cell of thegroup. Each group of cells forms a PUCCH Cell Group (CG). Herein, theUCI of the PUCCH CG where the Pcell is located is fed back on the Pcell.Some embodiments of the present disclosure describe a method fortransmitting UCI on the PUCCH of a cell. This method may be applicablefor each PUCCH CG of the UE.

In the LTE system, the UCI may include various kinds of information.i.e., HARQ-ACK, SR, P-CSI and A-CSI. In an uplink subframe, the UE mayneed to feed back one or more or all kinds of the above UCI. The CSI isfurther divided into two types. One is information has a higherreliability requirement such as RI. The other is information has arelatively lower reliability requirement, e.g. CQI/PMI. Hereinafter, theCSI with the higher reliability requirement is referred to as first typeCSI and the CSI with lower reliability requirement is referred to assecond type CSI, i.e., the first type CSI has higher reliabilityrequirement than the second type CSI.

In order to feed back more UCI on the PUCCH of one subframe, the LTEsystem has to introduce at least one new PUCCH format which is able tosupport a larger payload. This format may be a completely new format, ormay be obtained based on existing PUCCH format 3, PUSCH or other channelstructures. Hereinafter, they are referred to as PUCCH format X.

FIG. 2 shows a flowchart of a method for transmitting UCI on PUCCH usingformat X according to an embodiment of the present disclosure. Themethod includes the following.

At block 201, the UE receives UCI configuration information, wherein theUCI configuration information includes configuration information fordetermining periodicity, offset and corresponding PUCCH for transmissionof P-CSI in a subframe and configuration information for transmission ofHARQ-ACK.

At block 202, the UE processes one or more kinds of UCI in one subframe,and transmits the UCI on the PUCCH.

Hereinafter, the solution of the present disclosure is described withreference to some embodiments.

Embodiment 1

In the current LTE system, one PUCCH format is dedicated for onefunction. Accordingly, power control parameters are also dedicated forone PUCCH format. For example, PUCCH format 2 is dedicated fortransmission of P-CSI. Therefore, uplink transmit power is configuredaccording to the performance requirement of P-CSI. PUCCH format 3 isused for transmitting UCI which includes at least the HARQ-ACK. Due tothe existence of the HARQ-ACK, the uplink transmit power is configuredaccording to the requirement of the HARQ-ACK.

In order to support larger payload, the LTE system needs to introducePUCCH format X. The PUCCH using format X supports transmission ofmultiple kinds of UCI, i.e., may implement various functions. Inaddition, without violating the 22-bit restriction of the total numberof bits, PUCCH format 3 can also support transmission of multiple kindsof UCI, i.e., implement multiple kinds of functions. In particular, forthe PUCCH format X and format 3, it is possible that merely the HARQ-ACKinformation or merely the P-CSI is transmitted, or two kinds of UCI suchas HARQ-ACK and P-CSI are transmitted simultaneously. In the case thatthe P-CSI is transmitted, there may be different situations: a situationthat merely the RI-type P-CSI is transmitted, a situation that merelythe CQI/PMI-type P-CSI is transmitted, and a situation that both theRI-type and the CQI-PMI-type P-CSI are transmitted. Generally, differentkinds of UCI have different performance requirements, thus havedifferent requirements for power control parameter configuration. Forfacilitating the description, the PUCCH format X and the PUCCH format 3are referred to as PUCCH format Y hereinafter.

Based on the above analysis, the PUCCH may support the transmission ofdifferent kinds of UCI using format Y. In the embodiments of the presentdisclosure, uplink power control parameters are respectively configuredwith respect to different kinds of UCI transmitted on the PUCCH usingformat Y. For example, uplink power control parameters may be configuredrespectively for each kind of UCI and each combination of the kinds ofthe UCI. Or, the UCI may be classified into fewer situations andcorresponding uplink power control parameters are configured for eachUCI situation, so as to reduce signaling overhead. For example, it ispossible to differentiate merely two situations: a situation that merelyP-CSI is transmitted and a situation that at least HARQ-ACK istransmitted. Or, based on the reliability requirement, the UCI may beclassified into two situations: a situation that merely the CQI/PMI-typeP-CSI is transmitted, and a situation that at least HARQ-ACK and/or RIare transmitted. Then, uplink power control parameters may berespectively configured for these two situations. Or, the UCI may beclassifies into three situations: a situation that merely CQI/PMI-typeP-CSI is transmitted, a situation that RI and HARQ-ACK are transmitted,and a situation that at least HARQ-ACK is transmitted. Then, uplinkpower control parameters may be respectively configured for the threesituations.

For the PUCCH format Y, with respect to different number of bits of thepayload, the corresponding coding rate may be different, whichinevitably leads to difference of decoding performance. As such, thesize of the payload of the PUCCH format Y may be divided into multipleregions, and uplink power control parameters may be configuredrespectively for each region.

In order to support larger payload, one possible method is to feed backUCI using 16QAM modulation. That means, according to link status, for aUE with a better link, 16QAM may be adopted, whereas for other UEs. QPSKis still utilized. Due to the difference of the modulation schemes, thelink performances are different. For example, the configuration of the16QAM modulation may be relevant to the size of the UCI payload, i.e.,if the number of UCI bits exceeds a threshold, it is implicitlyindicated that 16QAM is to be utilized. Or, the utilization of 16QAM mayalso be determined according to the UCI type. For example, in the casethat merely the CQI/PMI-type P-CSI is transmitted, 16QAM is utilized;whereas in the case that HARQ-ACK and/or RI are transmitted, QPSK isutilized. Thus, for one PUCCH format Y, uplink power control parametersmay be respectively configured according to the adopted modulationscheme.

In order to support larger payload, it is also possible to increase thenumber of PRBs occupied by the PUCCH using format Y, which has the sameeffect with decreasing coding rate. Thus, for one PUCCH format Y, uplinkpower control parameters may be configured with respect to differentnumber of PRBs allocated to the UE.

The above describes some conditions for triggering the respectiveconfiguration of the uplink power control parameters, i.e., differenceof transmitted UCI, different regions of payload sizes, difference ofmodulation schemes and vary of PRB numbers occupied by the PUCCH usingformat Y. For one PUCCH format Y, uplink power control parameters may beconfigured with respect to different situations of one the aboveconditions. Or the above conditions may be utilized in combination andthe uplink power control parameters may be configured with respect todifferent combinations of the situations of the above conditions.

One uplink power control processing method is to process the powercontrol of PUCCH using format Y based on the PUCCH power control methodin existing specifications.

According to the current LTE specifications, for cell c, the transmitpower for the PUCCH transmission in subframe i is defined by:

$\begin{matrix}{{{P_{PUCCH}(i)} = {\min{\begin{Bmatrix}{{P_{{CMAX},c}(i)},} \\{P_{0{\_ PUCCH}} + {PL}_{c} + {h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} +} \\{{\Delta_{F\_ PUCCH}(F)} + {\Delta_{TxD}\left( F^{\prime} \right)} + {g(i)}}\end{Bmatrix}\lbrack{dBm}\rbrack}}},} & (1)\end{matrix}$

Wherein definitions for parameters in the formula (1) may be seen fromsection 5.1.2.1 of 3GPP specification 36.213. Those are brieflydescribed as follows. P_(CMAX,c)(i) denotes a configured UE maximumtransmit power in subframe i for cell c; Δ_(F_PUCCH)(F) is a poweroffset relative to a reference format (in the LTE, the reference formatis PUCCH format 1a); Δ_(TXD)(F′) corresponds to a PUCCH format and isrelevant to whether transmission diversity is adopted; PL_(C) denotespath loss; P_(0_PUCCH) is a power offset configured by higher layersignaling; g(i) is an accumulative value of closed loop power control;h(n_(CQI),n_(HARQ),n_(SR)) is a power offset relative to the PUCCHformat and the number of UCI bits to be fed back, n_(CQI) denotes thenumber of CSI bits to be fed back in subframe i; n_(SR) denotes thenumber of SR bits to be fed back in subframe i, having a value of 0 or1; n_(HARQ) denotes the number of effective HARQ-ACK bits actuallytransmitted in subframe i.

Among the above PUCCH power control parameters, P_(CMAX,c)(i), P_(LC),and P_(0_PUCCH) are common parameters and are irrelevant to the PUCCHformat, whereas Δ_(TXD)(F′). Δ_(F_PUCCH)(F) andh(n_(CQI),n_(HARQ),n_(SR)) are relevant to the PUCCH format. Inparticular, for one PUCCH format Y, for different situations of one ofthe above conditions or for a combination of different situations ofabove conditions, a first method for configuring the uplink powercontrol parameters includes: configuring Δ_(F_PUCCH)(F) respectively andconfiguring a consistent value for other parameters, such that the valueof Δ_(F_PUCCH)(F) may be different. Or, for one PUCCH format Y, fordifferent situations of one of the above conditions or for a combinationof different situations of above conditions, a second method forconfiguring the uplink power control parameters includes: respectivelyconfiguring different h(n_(CQI),n_(HARQ),n_(SR)), and configuring aconsistent value for other parameters. Or, for one PUCCH format Y, fordifferent situations of one of the above conditions or for a combinationof different situations of above conditions, a third method forconfiguring the uplink power control parameters includes: respectivelyconfiguring the parameters h(n_(CQI),n_(HARQ),n_(SR)) and Δ_(F_PUCCH)(F)and configuring a consistent value for other parameters, such that thevalue of Δ_(F_PUCCH)(F) may also be different. The parameter Δ_(TxD)(F′)is relevant to transmission diversity. It is possible to configure aunique Δ_(TxD)(F′) for the PUCCH format Y. Or, based on the above threemethods for configuring the uplink power control parameters, the valueof Δ_(TxD)(F′) may also be respectively configured, such that the valueof Δ_(TxD)(F′) may also be different.

Herein, the parameter h(n_(CQI),n_(HARQ),n_(SR)) may be a power offsetcalculated based on respective number of bits of HARQ-ACK, P-CSI and SR.The form of the function may vary with respect to different conditionsand different combinations of the conditions, so as to meet therequirement of the link performance. h(n_(CQI),n_(HARQ),n_(SR)) may alsobe a function of the number of bits of various kinds of UCI and otherparameters. For example, the other parameters may include the number ofmodulation symbols occupied by each kind of UCI or a total number ofmodulation symbols of the PUCCH using format Y. In other words, it ispossible to calculate h(n_(CQI),n_(HARQ),n_(SR)) according to the numberof bits of one category of UCI and the number of modulation symbolsoccupied by the kind of UCI. For example, suppose that the number ofmodulation symbols occupied by the HARQ-ACK and SR is N_(RE)^(HARQ-ACK&SR), thenh(n_(CQI),n_(HARQ),n_(SR))=ƒ((n_(HARQ)+n_(SR))/N_(RE) ^(HARQ-ACK&SR)).Or, it is also possible to calculate h(n_(CQI),n_(HARQ),n_(SR))according to the number of bits of each kind of UCI and their respectivenumber of modulation symbols. For example, suppose that the number ofmodulation symbols occupied by CSI is N_(RE) ^(CQI), thenh(n_(CQI),n_(HARQ),n_(SR))=ƒ(n_(CQI)/N_(RE)^(CQI),(n_(HARQ)+n_(SR))/N_(RE) ^(HARQ-ACK&SR)). Or, it is also possibleto calculate the power offset h(n_(CQI),n_(HARQ),n_(SR)) according tothe number of bits of each kind of UCI and the total number ofmodulation symbols, thenh(n_(CQI),n_(HARQ),n_(SR))=ƒ((n_(CQI)+n_(HARQ)+n_(SR))/N_(RE)). The formof parameter h(n_(CQI),n_(HARQ),n_(SR)) and the function f(x) are notrestricted in the present disclosure.

In addition, for the above PUCCH format Y, for different situations ofone of the above conditions or for different combinations of situationsof the above conditions, it is possible to respectively configure theparameter P_(0_PUCCH), such that the value of P_(0_PUCCH) may bedifferent, so as to meet the power control requirements in differentsituations. According to this method, the P_(0_PUCCH) is no longer acommon parameter irrelevant to the PUCCH format. Herein, with respect todifferent situations of one of the above conditions or combinations ofdifferent situations of the above conditions, it is possible to supportthe change of merely the parameter P_(0_PUCCH) in the above PUCCH powercontrol formula, or support the change of other power control parametersΔ_(F_PUCCH)(F), h(n_(CQI),n_(HARQ),n_(SR)) and/or Δ_(TxD)(F′) inaddition to the parameter P_(0_PUCCH).

In addition, in the method for configuring uplink power controlparameters based on the number of PRBs occupied by the PUCCH usingformat Y, an item M_(PRB)(i) reflecting the number of PRBs may beintroduced into the PUCCH power control formula (1), e.g.,

$\begin{matrix}{{{P_{PUCCH}(i)} = {\min{\begin{Bmatrix}{{P_{{CMAX},c}(i)},} \\{{10{\log_{10}\left( {M_{PRB}(i)} \right)}} + P_{0{\_ PUCCH}} + {PL}_{c} +} \\{{h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} + {\Delta_{F\_ PUCCH}(F)} + {\Delta_{TxD}\left( F^{\prime} \right)} + {g(i)}}\end{Bmatrix}\lbrack{dBm}\rbrack}}},} & (2)\end{matrix}$

The present disclosure does not restrict whether other power controlparameters P_(0_PUCCH), Δ_(F_PUCCH)(F), h(n_(CQI),n_(HARQ),n_(SR))and/or Δ_(TxD)(F′) are changed according to the number of the PRBs.

In addition, in the method for configuring uplink power controlparameters based on the modulation scheme of the PUCCH format Y, an itemΔ_(MOD)(F″) reflecting the modulation scheme may be introduced into thePUCCH power control formula, i.e., Δ_(MOD)(F″) may be respectivelyconfigured with respect to the modulation schemes QPSK and 16QAM, assuch the value of Δ_(MOD)(F″) may be different. For example,

$\begin{matrix}{{P_{PUCCH}(i)} = {\min{\begin{Bmatrix}{{P_{{CMAX},c}(i)},} \\{P_{0{\_ PUCCH}} + {PL}_{c} + {h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} +} \\{{\Delta_{F\_ PUCCH}(F)} + {\Delta_{TxD}\left( F^{\prime} \right)} + {\Delta_{MOD}\left( F^{''} \right)} + {g(i)}}\end{Bmatrix}\lbrack{dBm}\rbrack}}} & (3)\end{matrix}$

It is not restricted in the present disclosure that whether other powercontrol parameters P_(0_PUCCH), Δ_(F_PUCCH)(F),h(n_(CQI),n_(HARQ),n_(SR)) and/or Δ_(TxD)(F′) are changed while themodulation scheme changes.

Another method for processing the uplink power control is to process thepower control of the PUCCH using format Y based on the current PUSCHpower control method.

According to the existing LTE specifications, in the case that there isno PUCCH transmission, for cell c, the transmit power for the PUSCHtransmission in subframe i is defined by:

$\begin{matrix}{{P_{{PUCCH},c}(i)} = {\min{\left\{ {\begin{matrix}{{P_{{CMAX},c}(i)},} \\{{10{\log_{10}\left( {M_{{PUSCH},c}(i)} \right)}} + {P_{{0{\_ PUSCH}},c}(j)}} \\{{{\alpha_{c}(j)} \cdot {PL}_{c}} + {\Delta_{{TF},c}(i)} + {f_{c}(i)}}\end{matrix} +} \right\}\lbrack{dBm}\rbrack}}} & (4)\end{matrix}$

Definitions of the parameters in the formula (4) may be seen in 3GPP 36.213, section 5.1.1.1 and are briefly described as follows: P_(CMAX,c)(i)denotes the maximum configured UE transmit power for cell c;P_(PUSCH,c)(i) denotes the number of PRBs occupied by the PUSCH;P_(0_PUSCH,c)(j) is a power offset configured by higher layer signaling;PL_(C) denotes link path loss; α_(c)(j) is used for compensating forsome or all of the path loss; f_(C)(i) is an accumulative value ofclosed loop power control; Δ_(TF,c)(i) is a parameter relative to MCS ofuplink transmission. In particular, for Ks=1.25, Δ_(TF,c)(i)=10log₁₀((2^(BPRE·K) ¹ −1)·β_(offset) ^(PUSCH)). For A-CSI is sent withoutuplink data, BPRE=O_(CQI)/N_(RE), β_(offset) ^(PUSCH)=β_(offset) ^(CQI).For the case that uplink data is sent,

${{BPRE} = {\sum\limits_{r = 0}^{C - 1}{K_{r}/N_{RE}}}},{{\beta_{offset}^{PUSCH} = 1};}$

C denotes the number of CBs divided from one TB, K_(r) denotes thenumber of bits of the rth CB. N_(RE) denotes the number of REs includedin the PUSCH.

If the above PUSCH power control formula is used for PUCCH powercontrol, then

$\begin{matrix}{{P_{{PUCCH},c}(i)} = {\min{\left\{ {\begin{matrix}{{P_{{CMAX},c}(i)},} \\{{10{\log_{10}\left( {M_{{PUSCH},c}(i)} \right)}} + {P_{{0{\_ PUSCH}},c}(j)}} \\{{{\alpha_{c}(j)} \cdot {PL}_{c}} + {\Delta_{{TF},c}(i)} + {f_{c}(i)}}\end{matrix} +} \right\}\lbrack{dBm}\rbrack}}} & (5)\end{matrix}$

wherein α_(c)(j) may be configured to 1, such that it is consistent withgeneral PUCCH power control processing method. f_(c)(i) is modified tobe processed based on TPC command of the PUCCH.

M_(PUSCH,c)(i) denotes the number of PRBs occupied by the PUCCH usingformat Y. If there is only one PUCCH using format Y in a subframe, thePUCCH using format Y may be used for transmitting the UC. At this time,M_(PUSCH,c)(i) denotes the number of PRBs occupied by the PUCCH usingformat Y. If multiple kinds of UCI need to be fed back in the subframeand multiple PUCCHs using format Y are correspondingly configured, oneof the PUCCH using format Y may be used for transmitting the multiplekinds of UCI, thus the M_(PUSCH,c)(i) denotes the number of PRBsoccupied by this PUCCH using format Y. Or, the PRBs of multiple PUCCHsusing format Y may be utilized to transmit the UCI. For example, the UCImay be transmitted on all PRBs of the multiple PUCCHs using format Yaccording to the structure of the PUSCH. Thus, the M_(PUSCH,c)(i)denotes the sum of PRBs of the multiple PUCCHs using format Y. Forexample, if the PRBs of two PUCCHs using format Y are inconsecutive,they correspond to a PUSCH including two sets of PRBs, wherein each setof PRBs corresponds to one PUCCH using format Y.

If the value of P_(O_PUSCH,c)(j) configured for the uplink transmissionof PUSCH does not meet the requirement of PUCCH, the parameterP_(O_PUSCH,c)(j) used for the PUCCH power control may be speciallyconfigured by higher layer signaling, thus its value may be differentfrom conventional PUSCH power control parameter. In particular, thevalue range of the parameter P_(O_PUSCH,c)(j) used for the PUCCH powercontrol may be different from that used for PUSCH power control. Herein,it is possible to configure the same parameter P_(O_PUSCH,c)(j) for allsituations of the PUCCH format Y. Or, according to the above analysis,different kinds of UCI have different performance requirements andtherefore have different configuration requirements for the powercontrol parameters. Accordingly, it is possible to respectivelyconfigure the parameter P_(O_PUSCH,c)(j) with respect to different kindsof UCI transmitted on the PUCCH using format Y. As such, with respect todifferent kinds of UCI, the value of the P_(O_PUSCH,c)(j) may bedifferent. Herein, the uplink power control parameters may berespectively configured for each kind and each combination of UCI. Or,the UCI may be classified into fewer situations, and uplink powercontrol parameters may be configured with respect to these situations,so as to reduce signaling overhead. Δ_(TF,c)(i)=10 log₁₀((2^(BPRE·K) ¹−1)·β_(offset) ^(PUSCH)) may be changed to be processed based on the UCIfed back on the PUCCH using format Y, e.g., calculated according to thenumber of UCI bits N_(UCI), BPRE=N_(UCI)/N_(RE). Herein, N_(RE) denotesthe total number of REs in the PRBs used for feeding back the UCI. Ifmerely one kind of UCI is fed back on the PUCCH using format Y, e.g.,P-CSI or HARQ-ACK. N_(UCI) equals to the number of bits of this kind ofUCI. The power control is processed based on the parameter β_(offset)^(PUSCH) corresponding to this kind of UCI. If multiple kinds of UCI arefed back simultaneously, N_(UCI) may denote the sum of bits of variouskinds of UCI fed back in one subframe, and the parameter β_(offset)^(PUSCH) offset of one of the multiple kinds of UCI is adopted toprocess the power control, e.g., the parameter of the UCI having thehighest reliability requirement among the multiple kinds of UCI. Or,N_(UCI) may be obtained after processing the number of bits of each kindof UCI.

For example, the number of bits of each kind of UCI is equivalentlyconverted into the number of bits of the same selected kind of UCI and asum of the equivalent numbers of bits is calculated, and the parameterβ_(offset) ^(PUSCH) offset of the selected kind of UCI is adopted toprocess the power control. The detailed form of the function forconverting the number of bits of each kind of UCI is not restricted inthe present disclosure. Or, for multiple kinds of UCI transmitted in onesubframe, the power control may be implemented based on the number ofbits n_(m) of one kind UCI m and the number of its occupied modulationsymbols N_(RE) ^(m), i.e., BPRE=N_(M)/N_(RE) ^(m), and adopting theparameter β_(offset) ^(PUSCH) of this kind of UCI m. For example, theUCI m may be the kind of UCI having the highest reliability requirementamong the multiple kinds of UCI transmitted in the same subframe, e.g.HARQ-ACK. Δ_(TF,c)(i) may realize the effect of adjusting the transmitpower according to the number of UCI bits, i.e., similar toh(n_(CQI),n_(HARQ),n_(SR)) in the PUCCH power control formula. Herein,since the PUCCH using format Y and the current PUSCH have differentperformance requirements and different interference scenarios, theparameter Δ_(TF,c)(i) for the PUCCH using format Y may be configured byhigher layer signaling, thus its value may be different from that ofconventional PUSCH. For example, a different parameter K_(S) used forPUCCH power control may be configured in advance or configured viahigher layer signaling.

According to the above analysis, the PUCCH using format Y may beardifferent kinds of UCI. Since the different kinds of UCI have differentperformance requirements, the configuration of their power controlparameters also need to be different. Thus, with respect to differentkinds of UCI transmitted in the PUCCH using format Y, the uplink powercontrol parameters have to be configured respectively. A parameterΔ_(UCI)(i) relevant to the kind of the transmitted UCI may be introducedin the formula (5):

$\begin{matrix}{{P_{{PUCCH},c}(i)} = {\min{\left\{ {\begin{matrix}{{P_{{CMAX},c}(i)},} \\{{10{\log_{10}\left( {M_{{PUSCH},c}(i)} \right)}} + {P_{{0{\_ PUSCH}},c}(j)}} \\{{{\alpha_{c}(j)} \cdot {PL}_{c}} + {\Delta_{{TF},c}(i)} + {\Delta_{UCI}(i)} + {f_{c}(i)}}\end{matrix} +} \right\}\lbrack{dBm}\rbrack}}} & (6)\end{matrix}$

With respect to different kinds of UCI transmitted in the PUCCH usingformat Y, the parameter Δ_(UCI)(i) may be configured differently, so asto have different values. Herein, the uplink power control parametersmay be respectively configured for each kind and each combination of theUCI. Or the UCI may be classified into fewer situations, and the uplinkpower control parameters may be configured with respect to eachsituation, so as to reduce signaling overhead.

Embodiment 2

In order to support larger payload, the LTE system needs to introducePUCCH format X. A PUCCH using format X may bear various kinds of UCI. Inaddition, without violating the 22-bit restriction of the total numberof bits, the PUCCH format 3 is also able to bear multiple kinds of UCI.For facilitating the description, the PUCCH format X and the PUCCHformat 3 are referred to as PUCCH format Y hereinafter.

For one PUCCH using format Y, if multiple kinds of UCI needs to be fedback, joint coding, rate matching and modulation may be performed to allof the UCI without differentiating the UCI, and then the UCI is mappedto the PUCCH using format Y. At this time, the uplink transmit power iscalculated according to the total number of UCI bits based on the kindof UCI with the highest reliability requirement among the transmittedUCI. Suppose that the power control formula for the kind of UCI with thehighest reliability requirement is P=f(x), wherein x denotes the numberof bits of the UCI having the highest reliability requirement. Then theUE uplink transmit power is

${P_{total} = {f\left( {{\sum\limits_{i}N_{i}} + N_{CRC}} \right)}},$

wherein denotes number of bits of the th kind of UCI fed back in thesubframe, N_(CRC) denotes the number of CRC bits added for the UCItransmission. The number of CRC bits may be 0, i.e., no CRC bit isadded; or it may be an integer larger than 0.

For example, according to the method of embodiment 1, the uplink powercontrol parameters are configured with respect to different kinds of UCItransmitted on the PUCCH using format Y. For example, for the situationthat merely the CQI/PMI-type P-CSI is transmitted, the uplink powercontrol is performed based on one set of parameters, and for thesituation that at least HARQ-ACK and/or RI are transmitted, the uplinkpower control is performed based on another set of parameters. Or, forthe situation that merely the P-CSI is transmitted, the uplink powercontrol is performed based on one set of parameters, and for thesituation that at least HARQ-ACK is transmitted, the uplink powercontrol is performed based on another set of parameters. Or, thereliability requirements of the HARQ-ACK and the R are differentiated.The CQI/PMI-type P-CSI has the lowest reliability requirement. Thus, forthe situation that merely the CQI/PMI-type P-CSI is transmitted, theuplink power control is performed based on a first set of parameters.For the situation that the UCI with higher but not the highestreliability requirement is transmitted, the uplink power control isperformed based on a second set of parameters. For the situation thatthe UCI with the highest reliability requirement is transmitted, theuplink power control is performed based on a third set of parameters.

For the PUCCH using format Y, if it is required to transmit multiplekinds of UCI, the UCI may be firstly classified into differentcategories. Then coding, rate matching and modulation are respectivelyperformed for different categories of UCI before mapping to the PUCCHusing format Y. Herein, each category of UCI is mapped to somemodulation symbols of the PUCCH using format Y, and the sum of themodulation symbols of respective category of UCI equals to the totalnumber of modulation symbols of the PUCCH using format Y. For example,the HARQ-ACK and SR may be classified into one category, and the P-CSImay be classified into another category. Or, information with higherreliability requirement such as HARQ-ACK, SR and the first type CSI maybe classified into one category, the second type CSI which has lowerreliability requirement may be classified into another category. The twocategories of UCI are respectively denoted by UCI_1 and UCI_2 and theirnumbers of bits are respectively N1 and N2. Or, the UCI may beclassified into three categories. For example, the HARQ-ACK and the SRare a first category, the first type CSI is a second category, and thesecond type CSI is the third category. Or, the HARQ-ACK is the firstcategory, the first type CSI and the SR are the second category, and thesecond type CSI is the third category. The three categories of UCI arerespectively denoted by UCI_1, UCI_2 and UCI_3, and their numbers ofbits are respectively N1, N2 and N3.

FIG. 3 shows the classification of two categories of UCI according to anembodiment of the present disclosure. Since the coding, rate matching,modulation and channel mapping are respectively performed for eachcategory of UCI, the two categories of UCI respectively occupies N_(RE)⁽¹⁾ and N_(RE) ⁽²⁾ modulation symbols, wherein the sum of N_(RE) ⁽¹⁾ andN_(RE) ⁽²⁾ equals to the total number of modulation symbols of the PUCCHformat Y. is an equivalent parameter of the two categories of UCI. Fordifferent power control algorithms, there may be different methods toconfigure α. For example, α may be used for converting the number ofbits of respective kind of UCI to an equivalent number of bits of thesame kind of UCI information; or, α may be a proportion of transmitpowers of two categories of UCI; or, α may be a proportion of numbers ofmodulation symbols occupied by two categories of UCI.

According to the above UCI classification method, if merely one categoryof UCI needs to be fed back on the PUCCH using format Y, the uplinktransmit power may be determined directly according to the number ofbits of this category of UCI. If multiple categories of UCI need to befed back on the PUCCH using format Y, the power control method for thePUCCH using format Y is described hereinafter.

In a first method, the number of bits of each category of UCI isequivalently converted to the same category, the equivalent total numberof bits of this category of UCI is calculated, and the power control isperformed according to the equivalent total number of bits based on therequirement of this category of UCI. Herein, the UE transmit power maybe calculated using the method for performing power control inembodiment 1 such as formula (1), (2), (3), (5) or (6). For example,suppose that the UCI of the PUCCH using format Y is divided into twocategories, without loss of generality, referred to as a first categoryof UCI and a second category of UCI. The number of bits of the secondcategory of UCI is equivalently converted to the number of bits of thefirst category of UCI. Thus, the equivalent total number of bits isN=N₁+αN₂, wherein α is a coefficient for equivalently converting thenumber of bits of the second category of UCI to the first category ofUCI. α may be configured by higher layer signaling or defined inadvance. Or, α may be calculated based on other parameters. For example,a parameter B_(offset) ^(PUSCH) is respectively configured for the firstcategory of UCI and the second category of UCI for calculating thenumber of modulation symbols when they are mapped to the PUSCH fortransmission, respectively denoted by β₁ and β. At this time, α may be aratio of β₁ and β₂, α=β₁/β₂. The value of α may also be calculatedaccording to the difference of the performance requirements of the firstcategory of UCI and second category of UCI. Then, based on the powercontrol formula of the first category of UCI f(N₁), wherein N₁ denotesthe number of bits of the first category of UCI, the UE uplink transmitpower may be calculated using the equivalent total number of bits byf(N)=f(N₁+αN₂+N_(CRC)). For example, suppose that the UCI of the PUCCHusing format Y is divided into three categories, without loss ofgenerality, referred to as first category of UCI, second category of UCIand third category of UCI. If the all of three categories exist, thenumber of bits of the second category of UCI and the number of bits ofthe third category of UCI are equivalently converted to the firstcategory of UCI, thus the equivalent total number of bits isN=N₁+αN₂+βN₃, wherein and α are β respectively parameters forequivalently converting the number of bits of the second category of UCIand the number of bits of the third category of UCI into the firstcategory of UCI. α and β may be configured by higher layer signaling ordefined in advance. Or, α and β may be calculated based on otherparameters. For example, a parameter β_(offset) ^(PUSCH) is respectivelyconfigured for the first category of UCI, the second category of UCI andthe third category of UCI for calculating the number of modulationsymbols when they are mapped to the PUSCH for transmission, respectivelydenoted by β₁, β₂ and β₃. At this time, α and β may respectively be aratio of β₂ and β₃ to α=β₂/β₁, β=β₃/β₁. Then, based on the power controlformula of the first category of UCI f(N₁), the UE uplink transmit powermay be calculated using the equivalent total number of bits byƒ(N)=ƒ(N₁+αN₂+βN₃+N_(CRC)). If there are merely two of the threecategories of UCI in the current subframe, the calculation can still beperformed based on the above formula, and the number of bits of thecategory of non-exist UCI is configured to 0. Or, if merely the secondcategory of UCI and the third category of UCI exist, the number of bitsof the second category of UCI may be equivalently converted to thenumber of bits of the second category of UCI, thus the equivalent totalnumber of bits is M=N₂+rN₃. Then, based on the power control formula ofthe second category of UCI g(N₂), the UE uplink transmit power may becalculated using the equivalent total number of bits byg(M)=g(N₂+rN₃+N_(CRC)). r is ea coefficient for equivalently convertingthe number of bits of the third category of UCI to the second categoryof UCI. r may be configured by higher layer signalling or defined inadvance. In particular, r may be calculated based on α and β, e.g.,γ=β/α=β₃/β₂.

In a second method, as to the first category of UCI, the uplink transmitpower required for feeding back merely this category of UCI on the PUCCHusing format Y is calculated according to its number of bits, denoted byf(N₁). Then, according to the number of bits and performance requirementof each category of UCI needs to be fed back in the current subframe,f(N₁) is weighted to obtained the actual UE transmit power. Herein, theUE transmit power may be calculated based on the power control method inembodiment 1, e.g., formula (1), (2), (3), (5) or (6). For example,suppose that the UCI of the PUCCH using format Y is divided into twocategories, the UE total transmit power may beƒ(N₁+N_(CRC))·(1+α(N₁,N₂)). Or, suppose that the PUCCH format Y UCI isdivided into three categories, the UE total transmit power isƒ(N₁+N_(CRC))·(1+α(N₁,N₂)+β(N₁,N₃)) if all of the three categories ofUCI exist. α(N₁,N₂) is a proportion between the transmit power of thesecond category of UCI and that of the first category of UCI, β(N₁,N₃)is a proportion between the transmit power of the third category of UCIand that of the first category of UCI. Function forms of α(N₁,N₂) andβ(N₁,N₃) are relevant to the number of bits of respective category ofUCI and the performance requirement and are not restricted in thepresent disclosure. One possible method includes: calculating the aboveequivalent coefficients α(N₁,N₂) and β(N₁,N₃) according to the number ofmodulation symbols allocated to each category of UCI. Take α(N₁,N₂) asan example, suppose that the number of modulation symbols allocated tothe first category of UCI and the second category of UCI arerespectively N_(RE) ⁽¹⁾ and N_(RE) ⁽²⁾. Thus, the equivalent coefficientmay be α(N₁,N₂)=N_(RE) ⁽²⁾/N_(RE) ⁽¹⁾. If there are merely two of thethree categories of UCI in the current subframe, the calculation may beperformed still based on the above formula and the transmit power of thecategory of non-existing UCI is configured to be 0. Or, if there aremerely the second category of UCI and the third category of UCI, thetransmit power of the third category of UCI may be equivalentlyconverted to the second category of UCI. The UE total transmit powerg(N₂)·(1+r(N₂,N₃)), wherein r(N₂,N₃) is a ratio of the transmit power ofthe third category of UCI to the transmit power of the second categoryof UCI, r(N₂,N₃) may be configured by higher layer signaling or definedin advance. In particular, r(N₂,N₃) may be calculated based on α(N₁,N₂)and β(N₁, N₃), e.g., r(N₂,N₃)=β(N₁,N₃)/α(N₁,N₂).

In a third method, for the multiple categories of UCI to be fed back,the UE transmit power is calculated based on the number of bits N_(m) ofmerely one category UCI m and the number of modulation symbols N_(RE)^((m)) actually used for transmitting UCI m on the PUCCH using format Y.Herein, N_(RE) ^((m)) is smaller than or equal to the total number ofmodulation symbols Nu available for UCI m on the PUCCH using format Y.The UCI m may be a predefined UCI category or a UCI category defined byhigher layer signaling. Or, the UCI m may be a UCI category having thehighest reliability requirement, e.g., HARQ-ACK, so as to ensure itstransmission performance. Or, the UCI m may be a UCI category having thelowest reliability requirement, e.g., CQI/PMI. Suppose that the UCI withhigh reliability requirement is considered preferably when allocationmodulation symbols of the PUCCH using format Y. Thus, a littleproportion of the REs is allocated to the UCI category with lowestreliability requirement, which meets the performance requirement of theUCI category with the lowest reliability requirement and also meet theperformance requirement of other UCI categories. For example, based onthe formula (5) in embodiment 1, the parameter Δ_(TF,c)(i)=10log₁₀((2^(BPRE·K) ¹ −1)·β_(offset) ^(PUSCH)) may be determined accordingto the number of bits of UCI m and the number of modulation symbolsoccupied by UCI m, i.e., BPRE=N_(m)/N_(RE) ^((m)), and the parameterβ_(offset) ^(PUSCH) corresponding to UCI m is adopted. Herein, BPRE isan actual coding rate in proportion to UCI m. Therefore, the BPRE andΔ_(TF,c)(i) calculated according to the above method can meet theperformance requirement of UCI m. Suppose that the modulation symbols ofthe PUCCH using format Y are allocated to multiple UCI categoriesaccording to their performance requirements, e.g., the modulationsymbols are allocated according to the number of bits and the parameterβ_(offset) ^(PUSCH) offset of respective UCI category. Thus, the abovepower control method is able to ensure the performance of the UCI m aswell as the performance requirement of other UCI categories.

Based on the above first, second and third methods, if the multiplecategories of UCI fed back in one subframe are equivalently converted toa different UCI category, the calculated total uplink transmit power maybe different. Thus, in a fourth method, uplink transmit powers arerespectively calculated according to different equivalent convertingmethods, and a maximum value of the calculated uplink transmit powers istaken as the actual UE uplink transmit power. For example, as to theabove first method, suppose that the transmit power isƒ(N)=ƒ(N₁+αN₂+βN₃+N_(CRC)) if the multiple categories of UCI areequivalently seen as the first category of UCI, and the transmit poweris g(P)=g(N₂+α₂N₁+β₂N₃+N_(CRC)) if the multiple categories of UCI areequivalently seen as the second category of UCI, and the transmit poweris z(Q)=z(N₃+α₃N₁+β₃N₂+N_(CRC)) if the multiple categories of UCI areequivalently seen as the third category of UCI. Thus, the UE uplinktransmit power may be max[f(N),g(P),z(Q)]. The above functionsf(x),g(x),z(x) respectively denotes a form of the function where merelythe first, second or third category of UCI is transmitted. Thesefunctions may have the same or different forms.

In a fifth method, for each UC category, the uplink transmit powerrequired for feeding back this category of UCI on the PUCCH using formatY is calculated. Then, a sum of the uplink transmit powers of variouscategories of UCI need to be fed back in current subframe is calculatedto obtain the UE total transmit power for transmitting the UCI. Herein,the transmit power corresponding to each UCI category may be calculatedbased on the power control method in embodiment 1, e.g., formula (1),(2), (3), (5) or (6). For example, in the case that there are twocategories of UCI, suppose that the UE transmit power required fortransmitting the two categories of UCI are respectively f(N₁+N_(CRC))and g(N₂+N_(CRC)). Thus, the UE total transmit power for the twocategories of UCI is f(N₁+N_(CRC))+g(N₂+N_(CRC)), assuming that CRC withthe same length is added to each category of UCI. Or, in the case thatthere are three categories of UCI, suppose that the transmit powerrequired for transmitting the three categories of UC are respectively+N_(CRC), g(N₂+N_(CRC)) and z(N₃+N_(CRC)). Thus, the UE total transmitpower for transmitting the three categories of UCI isf(N₁+N_(CRC))+g(N₂+N_(CRC))+z(N₃+n_(CRC)), assuming that the CRC withthe same length is added to the three categories of UCI.

In a sixth method, although coding, rate matching and mapping areperformed independently for each category of UCI, the power control isstill performed based on the total number of bits of the UCI. Herein,the UE transmit power may be calculated according to the transmit powercontrol method in embodiment 1, e.g., the formula (1), (2), (3), (5) or(6). For example, the uplink transmit power may be calculated accordingto the power control formula of the UCI category with the highestreliability requirement and according to the total number of UCI bits.According to this method, a conservative transmit power may beconfigured since the total number of UCI bits is utilized. In addition,since independent coding and mapping are performed with respect to eachcategory of UCI, it is avoided that much power is wasted on the UCI withlow reliability requirement. As such, the UCI transmission performanceis improved.

In a seventh method, suppose that the UCI is divided into threecategories, and each category is respectively coded and mapped to thePUCCH using format Y. However, during the power control processing, somecategories may be processed together according to their total number ofbits. Herein, the UE transmit power may be calculated according to thetransmit power control method of embodiment 1, e.g. formula (1), (2),(3), (5) or (6). For example, the HARQ-ACK may be taken as a firstcategory of UCI, the first type CSI may be taken as a second category ofUCI, and the second type CSI may be taken as a third category of UCI.Thus, coding and mapping are performed to the HARQ-ACK and to the firsttype CSI independently. But since they have similar performancerequirement, they may be processed together during the power control,i.e., the uplink transmit power may be calculated based on the totalnumber of bits of the HARQ-ACK and the first type CS, in combinationwith the second type CSI.

In the above method, the UCI is divided into categories and coding, ratematching and mapping are performed to each category of UCIindependently. It is required to adjust the number of modulation symbolson the PUCCH using format Y occupied by each UCI category according totheir respective number of bits. In some cases, the actual coding rateof a certain category of UCI may be especially high, which is not goodfor ensuring the performance of the UCI. Therefore, it is provided inthe present disclosure that, for the method in which coding and mappingare performed independently for each category of UCI, when determiningthe number of modulation symbols of different categories of UCI, if thecoding rate of one category of UCI is especially high, the independentcoding is abandoned, i.e., joint coding is performed to all UCI bitsbefore mapping to the PUCCH using format Y for transmission. Otherwise,the independent coding and mapping method is adopted to process the UCItransmission.

Embodiment 3

In one subframe, the UE may have multiple PUCCH formats available fortransmitting the UCI. For example, PUCCH format 2 may bear up to 11 bitsP-CSI, PUCCH format 3 may bear up to 22 bits UCI, and PUCCH format X maybear more UCI bits. It is subject to the configuration of the basestation that which PUCCH format is adopted to transmit the UCI. Inparticular, for the P-CSI, up to LTE version 12, it is merely supportedto transmit the P-CSI using the PUCCH format 2. In fact, the PUCCHformat 3 may also be used for feeding back P-CSI, thus up to 22 bits aresupported. And PUCCH format X may also be used for feeding back theP-CSI, so as to support more bits. In view of the above, multiple PUCCHformats may be used for transmitting the P-CSI. For one PUCCH usingformat X, one or more PRBs may be occupied.

According to the current LTE specifications, during the configuration ofthe P-CSI transmission of the UE, for transmission modes 1-9, theperiodicity, subframe offset and PUCCH resource index for the P-CSI arerespectively configured for each cell. If the UE is configured with twoCSI subframe sets, the periodicity and the subframe offset for the P-CSImay be respectively configured for each subframe set, but merely onePUCCH resource index is configured for one cell. For transmission mode10, it is supported to configure periodicity and subframe offsetrespectively for the P-CSI of each CSI process. For a CSI processconfigured with two CSI subframe sets, periodicity and subframe offsetfor the P-CSI may be configured respectively for each subframe set; butmerely one PUCCH resource index is configured for all CSI processes/CSIsubframe sets of the same cell. Herein, although only one PUCCH resourceindex is configured, since the periodicity and/or offset of the P-CSI ofeach CSI process/CSI subframe set may be different, the PUCCH resourceindex may correspond to the PUCCH of different subframes to feed backthe P-CSI of different CSI processes/CSI subframe sets.

According to the current LTE specifications, if multiple P-CSI need tobe fed back in one subframe, priorities of the P-CSI are considered. TheUE merely transmits the P-CSI with the highest priority and directlydrops all of the other P-CSI with lower priorities. Herein, the P-CSIwith the highest priority is transmitted on the PUCCH corresponding tothis P-CSI. In order to provide more opportunities for transmitting theP-CSI, it is possible to support the transmission of P-CSI of multiplecells/CSI processes/CSI subframe sets in one subframe. For example, ifthe UE is configured with multiple cells, the amount of P-CSI that theUE needs to feed back is increased accordingly, and the probability forfeeding back the P-CSI of multiple cells/CSI processes/CSI subframes inthe same subframe is also increased. In order to avoid frequent droppingof the P-CSI, it may be supported to transmit the P-CSI of multiplecells/CSI processes/CSI subframes sets simultaneously.

In particular, in the case that reporting of the P-CSI of N cells/CSIprocesses/CSI subframe sets is configured in one subframe, the PUCCHused for transmitting the P-CSI may be unable to bear the N P-CSI. Thus,it is required to select M P-CSI from the N P-CSI according to apriority rule, wherein M is smaller than or equal to N, and the above Mselected P-CSI can be transmitted on the PUCCH. Multiple different PUCCHresources may be configured in the subframe corresponding to the NP-CSI.

One method for determining the M P-CSI transmitted in the subframeincludes: determining the number of bits can be transmitted by the PUCCHresources corresponding to the P-CSI of N cells/CSI processes/CSIsubframe sets, and selecting M P-CSI according to a maximum value Nmaxamong the numbers of bits can be transmitted by the PUCCH resources. Forexample, first M P-CSI with highest priorities under the condition thatthe total number of bits of the M P-CSI is not larger than Nmax may beselected. Herein, if it is further required to transmit HARQ-ACK in thecurrent subframe, it is possible to select first M P-CSI with highestpriorities under the condition that the sum of the total number of bitsof the selected M P-CSI and the number of HARQ-ACK bits is not largerthan Nmax. The present disclosure does not restrict the method forselecting the M P-CSI from the N P-CSI. Other methods may also beadopted.

Based on the above analysis, the above method is implemented based onthe assumption that the reporting of N P-CSI is configured in onesubframe and there are multiple corresponding PUCCH resources.Hereinafter, the configuration of the PUCCH resources corresponding tothe P-CSI is described.

In a first method, one PUCCH resource is allocated to each cell of theUE, including a PUCCH format and a PUCCH resource index, and it isconfigured that the PUCCH for each cell for transmitting the P-CSI usesthe same PUCCH format. Or, it may be configured by higher layersignaling or defined in advance that the PUCCH for each cell fortransmission of the P-CSI use the same PUCCH format, therefore it is notrequired to configure the PUCCH format for each cell. In addition, aPUCCH resource corresponding to the above PUCCH format is allocated toeach cell, such that the PUCCH resource index configured for each cellmay be different. For the PUCCH format X, different PUCCH resources mayoccupy the same number of PRBs or different numbers of PRBs. Herein, itis still restricted that the multiple CSI processes/CSI subframe sets ofthe same cell are configured with the same PUCCH format.

As described above, there may be multiple PUCCH formats used fortransmitting the P-CSI, and they can bear different number of bits. Indifferent subframes, the number of the cells/CSI processes/CSI subframesets whose P-CSI need to be fed back simultaneously may be different.Accordingly, the preferable PUCCH format for transmitting the P-CSI mayalso be different. Herein, one preferable method may include: for onesubframe, on the premise that the selected M P-CSI can be transmitted,the PUCCH format with lower bearing capability is selected as much aspossible, i.e., PUCCH format 2 is selected preferably, then PUCCH format3, and finally PUCCH format X. For PUCCH formats 2 and 3, multiplechannels using such PUCCH format may be multiplexed in one PRB, so as toincrease resource utilization ratio. Accordingly, a method forconfiguring different PUCCH formats used for transmitting P-CSI indifferent subframes is required. However, the above first method onlysupports configuring the same PUCCH format in different subframes, whichrestricts the link performance and the resource utilization ratio of theP-CSI.

In a second method, one PUCCH resource is allocated to each cell of theUE, including a PUCCH format and a PUCCH resource index. But the PUCCHfor transmitting the P-CSI configured for each cell is not restricted touse the same PUCCH format, i.e., if N P-CSI configured in one subframecorrespond to multiple cells, these P-CSI may correspond to multiplePUCCH formats and corresponding PUCCH resource indexes, e.g., PUCCHformat 2, format 3, and/or format X. For the PUCCH format X, differentPUCCH resources may occupy the same number or different numbers of PRBs.Herein, it is still restricted that the multiple CSI processes/CSIsubframe sets of the same cell are configured with the same PUCCHformat.

According to the second method, the same PUCCH resource is utilized forthe P-CSI of each CSI process/CSI subframe set of the same cell.However, since different PUCCH resources may be configured for differentcells, it is still able to transmit the P-CSI using resources ofdifferent PUCCH formats in different subframes through adjusting theP-CSI periodicity and subframe offset of each cell and selecting thePUCCH resource for transmitting the P-CSI in the subframe by a priorityrule. For example, the method for selecting the actual PUCCH resourcefor transmitting the P-CSI may include: for one subframe, on the premisethat the selected M P-CSI can be transmitted, selecting the PUCCHresource with a lower bearing capability from the multiple PUCCHresources configured for transmitting the P-CSI. However, since only onePUCCH resource can be configured for one cell, this method restricts thePUCCH resource configuration flexibility of the base station to someextent.

In a third method, one PUCCH resource is respectively configured foreach CSI process/CSI subframe set of each cell of the UE, including aPUCCH format and a PUCCH resource index, and it is restricted that thePUCCH for each P-CSI configured in one subframe use the same PUCCHformat.

In a fourth method, one PUCCH resource is respectively configured foreach CSI process CSI subframe set of each cell of the UE, including aPUCCH format and a PUCCH resource index, and the PUCCH for each P-CSIconfigured in one subframe may have a different PUCCH format.

For the third and fourth methods, for one cell, PUCCH resource may berespectively configured for each CSI process; or, PUCCH resource may berespectively configured for each CSI subframe set; or, PUCCH resourcemay be respectively configured for each combination of (CSI process, CSIsubframe set). Herein, for one cell, since the periodicity and subframeset configured for each CSI process/CSI subframe set are generallydifferent from other cells, configuration of different PUCCH formats fortransmitting P-CSI in different subframes is realized.

In a fifth method, for one cell of the UE, PUCCH resources of differentPUCCH formats are configured for transmitting P-CSI in differentsubframes, respectively including a PUCCH format and a PUCCH resourceindex. But it is restricted that the P-CSI of each cell in one subframeis configured to use the same PUCCH format. For example, the PUCCHformats and the PUCCH resource indexes adopted by subframes in oneperiod may be configured using a periodicity T, wherein T is a constantnumber.

In a sixth method, for a cell of the UE, PUCCH resources of differentPUCCH formats are configured for transmitting P-CSI in differentsubframes, respectively including a PUCCH format and a PUCCH resourceindex, and the P-CSI of cells in one subframe may be configured withdifferent PUCCH formats. For example, the PUCCH formats adopted bysubframes in one period may be configured using a periodicity T, whereinT is a constant number.

Based on the above six methods for configuring PUCCH resourcecorresponding to the P-CSI, one or more additional PUCCH resources maybe configured for the UE by higher layer signaling, respectivelyincluding a PUCCH format and a PUCCH resource index. Herein, theadditionally configured PUCCH resource may be different from the PUCCHresources configured based on the above six methods. In addition, ifmultiple additional PUCCH resources are configured, their PUCCH formatsmay also be different, e.g., PUCCH format 3 and PUCCH format X. Or, theadditional multiple PUCCH resources may use the same PUCCH format butoccupy different numbers of PRBs. As such, the method configuresresources of multiple PUCCH formats for the UE in one subframe.Therefore, the UE is able to select a most preferable PUCCH resource fortransmitting the P-CSI. The configuration information of theadditionally configured PUCCH resource may be sent only once, i.e.,applicable for the P-CSI of each cell CSI process/CSI subframe set ofthe UE, thus it is not required to repeatedly transmit for each cell/CSIprocess/CS subframe set of the UE. Or, the above six methods forconfiguring the PUCCH resource corresponding to the P-CSI may beextended directly, i.e., configuring one or more additional PUCCHresources for each cell of the UE, such that the additional PUCCHresource is applicable for all CSI processes/CSI subframe sets of thecell. Or, one or more additional PUCCH resources may be configured foreach cell/CSI process/CSI subframe set. As such, for one subframe,multiple different PUCCH resources may be configured for each P-CSI.Accordingly, for the N P-CSI in the subframe, there are also multipledifferent PUCCH resources, and the UE may select the PUCCH resourcesactually used for transmitting the P-CSI.

For example, based on the above first method, when configuring the P-CSIof a cell, it is restricted that the PUCCH resource used fortransmitting P-CSI of each cell uses the same PUCCH format. This PUCCHformat may be configured to the UE via RRC signaling. The informationmay be repeatedly transmitted to each cell of the UE, or may betransmitted only once and not repeatedly transmitted for each cell. Or,the PUCCH format may be defined in advance, e.g., fixedly configured asPUCCH format 2, i.e., supporting the feedback of the P-CSI of merely onecell/CSI process/CSI subframe set. In addition, the structure of theexisting RRC signaling for configuring the PUCCH resource of the P-CSIis reused as much as possible to configure the PUCCH resource index forP-CSI transmission respectively for each cell of the UE. The aboveresource index of each cell may be the same or different. In addition, aPUCCH resource may be additionally configured for the UE via higherlayer signaling, and its PUCCH format may be different from the PUCCHformat of the PUCCH resources configured for the cells based on thefirst method. As such, in each subframe, the UE may have two PUCCHformats used for P-CSI transmission. For example, it is predefined thatthe PUCCH format configured according to the above first method is PUCCHformat 2, and a PUCCH resource with format 3 is additionally configured.Or, multiple PUCCH resources are additionally configured for the UE viahigher layer signaling, and the additional PUCCH resources may havedifferent formats. The PUCCH formats of the additionally configuredPUCCH resources may be different from the PUCCH format of the PUCCHresources configured for the cells based on the above first method. Ifmultiple PUCCH resources of format X are configured, their numbers ofPRBs may be the same or different. Or, multiple PUCCH resources may beadditionally configured for the UE via higher layer signaling, and themultiple PUCCH resources have the same PUCCH format X, but they mayoccupy different number of PRBs. The UE may select a proper PUCCH formataccording to the total number of P-CSI bits to be fed back in thecurrent subframe and determine a corresponding PUCCH resource index. Forexample, it is possible to select the PUCCH format which is able to bearthe P-CSI to be fed back and has a relatively lower bearing capability,so as to increase the resource utilization ratio.

In one subframe, suppose that the P-CSI of N cells/CSI processes/CSIsubframe sets are configured, and the PUCCHs used for P-CSI transmissionuse the same PUCCH format but may correspond to multiple different PUCCHresource indexes.

In this situation, the UE may transmit the selected M P-CSI using thePUCCH corresponding to one of the multiple PUCCH resource indexes. Forexample, the PUCCH resource index of the PUCCH used for transmitting theP-CSI of the UE may be the PUCCH resource index corresponding to theP-CSI with the highest priority among the N P-CSI. Or, the PUCCHresource index of the PUCCH used for transmitting the P-CSI of the UEmay be the PUCCH resource index corresponding to the P-CSI with thehighest priority among the M selected P-CSI. Or, the PUCCH resourceindex of the PUCCH for transmitting the P-CSI of the UE may be a minimumresource index among the PUCCH resource indexes corresponding to the NP-CSI. Or, the PUCCH resource index of the PUCCH for transmitting theP-CSI of the UE may be a minimum resource index among the PUCCH resourceindexes corresponding to the M selected P-CSI.

In this situation, suppose that the UE has the capability of uplinkmultiple antenna transmission, the P-CSI of N cells/CSI processes areconfigured in one subframe and at least two PUCCH resource indexes arecorrespondingly configured; or at least two PUCCH resource indexes areconfigured corresponding to the selected M P-CSI. Then, the UE is ableto transmit the selected M P-CSI utilizing the PUCCHs corresponding tothe two PUCCH resource indexes, so as to obtain a transmission diversityeffect.

In one subframe, suppose that reporting of the P-CSI of N cells/CSIprocesses/CSI subframe sets is configured, and the PUCCH used for P-CSItransmission may have different PUCCH formats and PUCCH resourceindexes. The above multiple PUCCH resources may be obtained according toany one of the above second to sixth methods for configuring PUCCHresources corresponding to the P-CSI. Or, it is also possible toallocate according to the above sixth method for configuring the PUCCHresources corresponding to the P-CSI and further allocate one or moreadditional PUCCH resources.

In this situation, the UE may transmit the selected M P-CSI utilizingone of the above multiple PUCCH resources. For example, the PUCCHresource used by the UE for the P-CSI transmission may be the PUCCHresource configured for the P-CSI with the highest priority among the NP-CSI. If there are multiple PUCCH resources correspond to the P-CSIwith the highest priority, one of them may be utilized, e.g., the PUCCHresource with the minimum PUCCH resource index. Or, the PUCCH resourceused by the UE for the P-CSI transmission may be the PUCCH resourceconfigured for the P-CSI with the highest priority among the M P-CSI. Ifthere are multiple PUCCH resources correspond to the P-CSI with thehighest priority, one of them may be utilized, e.g., the PUCCH resourcewith the minimum PUCCH resource index. Or, the PUCCH resource used bythe UE for the P-CSI transmission may be the PUCCH resource which has ahighest bearing capability among the PUCCH resources configuring for theN P-CSI. If there are multiple PUCCH resources which have the highestbearing capability, one of them may be utilized, e.g., the PUCCHresource corresponding to the P-CSI with the highest priority, or thePUCCH resource with the minimum resource index. Or, the PUCCH resourceused by the UE for the P-CSI transmission may be the PUCCH resourcewhich has the highest bearing capability among the PUCCH resourcesconfiguring for the M P-CSI. If there are multiple PUCCH resources whichhave the highest bearing capability, one of them may be utilized. e.g.,the PUCCH resource corresponding to the P-CSI with the highest priority,or the PUCCH resource with the minimum resource index. Or, the PUCCHresource used by the UE for P-CSI transmission may be the PUCCH resourcewhich can bear the M selected P-CSI and has the lowest bearingcapability among the PUCCH resources configured for the N P-CSI. Ifthere are multiple PUCCH resources which have the lowest bearingcapability, one of them may be utilized, e.g., the PUCCH resourcecorresponding to the P-CSI with the highest priority, or the PUCCHresource with the minimum PUCCH resource index. Herein, if HARQ-ACK isfurther to be transmitted in the current subframe, it is also possibleto select, among the PUCCH resources configured for the N P-CSI, thePUCCH resource which can bear the M selected P-CSI and the HARQ-ACK andhas the lowest bearing capability. Or, the PUCCH resource used by the UEfor P-CSI transmission may be the PUCCH resource which can bear the Mselected P-CSI and has the lowest bearing capability among the PUCCHresources configured for the M P-CSI. If there are multiple PUCCHresources which have the lowest bearing capability, one of them may beutilized, e.g., the PUCCH resource corresponding to the P-CSI with thehighest priority, or the PUCCH resource with the minimum PUCCH resourceindex. Herein, if HARQ-ACK is further to be transmitted in the currentsubframe, it is also possible to select, among the PUCCH resourcesconfigured for the selected M P-CSI, the PUCCH resource which can bearthe M selected P-CSI and the HARQ-ACK and has the lowest bearingcapability.

In this situation, suppose that the UE has the capability of uplinkmultiple antenna transmission, the P-CSI of N cells/CSI processes areconfigured in one subframe and at least two PUCCH resources areconfigured accordingly; or at least two PUCCH resources are configuredfor M selected P-CSI. Then the UE is able to transmit the M selectedP-CSI utilizing the two PUCCH resources, so as to obtain a transmissiondiversity effect. Herein, it is possible to further restrict that thetwo PUCCH resources used by the UE for the P-CSI transmission have thesame PUCCH format.

In a seventh method, for a UE, the PUCCH resources for P-CSItransmission in subframes in one period are configured using aperiodicity T, respectively including a PUCCH format and a PUCCHresource index, T is a constant number. The signaling may be sent onlyonce, i.e., not repeatedly sent for each cell/CSI process/CSI subframeset of the UE. According to this method, only one PUCCH resource isconfigured for P-CSI transmission in one subframe. As such, the UEtransmits the P-CSI using this PUCCH resource.

In the embodiments of the present disclosure, the maximum value of theuplink transmit powers obtained via different equivalent convertingmethods is taken as the actual UE uplink transmit power.

Based on the above analysis, embodiments of the present disclosurefurther provide an apparatus used for transmitting uplink controlinformation.

FIG. 4 is a schematic diagram illustrating an apparatus for transmittinguplink control information according to an embodiment of the presentdisclosure. The apparatus 400 is applicable to a UE and includes thefollowing:

-   -   a configuration information receiving module 401, to receive        Uplink Control Information UCI configuration information,        including configuration information used for determining        periodicity, offset and PUCCH of the P-CSI to be fed back in one        subframe, and configuration information for HARQ-ACK        transmission; and

a UCI transmitting module 402, to process one or more kinds of UCI inone subframe, and transmit the UCI using PUCCH resource of one PUCCHformat.

The foregoing descriptions are only preferred embodiments of thisdisclosure and are not for use in limiting the protection scope thereof.Any changes and modifications can be made by those skilled in the artwithout departing from the spirit of this disclosure and thereforeshould be covered within the protection scope as set by the appendedclaims.

What is claimed is:
 1. A method performed by a terminal in acommunication system, the method comprising: receiving, from a basestation, configuration information on one or more physical uplinkcontrol channel (PUCCH) resources for transmitting multiple channelstate information (CSI); identifying a PUCCH resource for transmittinguplink control information (UCI) including the multiple CSI among theone or more PUCCH resources, based on a number of bits for the UCI;identifying power for transmission of the UCI based on a number ofphysical resource blocks (PRBs) corresponding to the PUCCH resource andthe number of bits for the UCI; and transmitting the UCI including themultiple CSI using the PUCCH resource based on the power for thetransmission of the UCI.
 2. The method of claim 1, wherein theconfiguration information includes an index and a format for each of theone or more PUCCH resources.
 3. The method of claim 1, wherein the PUCCHresource is identified as a PUCCH resource corresponding to a number ofbits which is smallest number being greater than or equal to the numberof bits for the UCI among the one or more PUCCH resources.
 4. The methodof claim 1, further comprising: selecting at least one CSI among themultiple CSI based on a priority value, in case that the number of bitsfor the UCI is greater than the greatest number of bits corresponding tothe one or more PUCCH resources; and transmitting the UCI including theselected at least one CSI using a PUCCH resource corresponding to thegreatest number of bits.
 5. The method of claim 1, wherein the power forthe transmission of the UCI is identified based on a ratio of the numberof bits for the UCI and a number of resource elements for the UCI.
 6. Amethod performed by a base station in a communication system, the methodcomprising: transmitting, to a terminal, configuration information onone or more physical uplink control channel (PUCCH) resources fortransmitting multiple channel state information (CSI); and receivinguplink control information (UCI) including the multiple CSI using aPUCCH resource based on power for the transmission of the UCI, whereinthe PUCCH resource for receiving the UCI including the multiple CSI isidentified among the one or more PUCCH resources, based on a number ofbits for the UCI, and wherein the power for the transmission of the UCIis identified based on a number of physical resource blocks (PRBs)corresponding to the PUCCH resource and the number of bits for the UCI.7. The method of claim 6, wherein the configuration information includesan index and a format for each of the one or more PUCCH resources. 8.The method of claim 6, wherein the PUCCH resource is identified as aPUCCH resource corresponding to a number of bits which is smallestnumber being greater than or equal to the number of bits for the UCIamong the one or more PUCCH resources.
 9. The method of claim 6, furthercomprising receiving the UCI including a selected at least one CSI usinga PUCCH resource corresponding to the greatest number of bits, whereinthe at least one CSI is selected among the multiple CSI based on apriority value, in case that the number of bits for the UCI is greaterthan the greatest number of bits corresponding to the one or more PUCCHresources
 10. The method of claim 6, wherein the power for thetransmission of the UCI is identified based on a ratio of the number ofbits for the UC and a number of resource elements for the UCI.
 11. Aterminal in a communication system, the terminal comprising: atransceiver; and a controller configured to: receive, from a basestation, configuration information on one or more physical uplinkcontrol channel (PUCCH) resources for transmitting multiple channelstate information (CSI); identify a PUCCH resource for transmittinguplink control information (UCI) including the multiple CSI among theone or more PUCCH resources, based on a number of bits for the UCI;identify power for transmission of the UCI based on a number of physicalresource blocks (PRBs) corresponding to the PUCCH resource and thenumber of bits for the UCI; and transmit the UCI including the multipleCSI using the PUCCH resource based on the power for the transmission ofthe UCI.
 12. The terminal of claim 11, wherein the configurationinformation includes an index and a format for each of the one or morePUCCH resources.
 13. The terminal of claim 11, wherein the PUCCHresource is identified as a PUCCH resource corresponding to a number ofbits which is smallest number being greater than or equal to the numberof bits for the UCI among the one or more PUCCH resources.
 14. Theterminal of claim 11, wherein the controller is further configured toselect at least one CSI among the multiple CSI based on a priorityvalue, in case that the number of bits for the UCI is greater than thegreatest number of bits corresponding to the one or more PUCCHresources; and transmit the UCI including the selected at least one CSIusing a PUCCH resource corresponding to the greatest number of bits. 15.The terminal of claim 11, wherein the power for the transmission of theUCI is identified based on a ratio of the number of bits for the UCI anda number of resource elements for the UCI.
 16. A base station in acommunication system, the base station comprising: a transceiver; and acontroller configured to: transmit, to a terminal, configurationinformation on one or more physical uplink control channel (PUCCH)resources for transmitting multiple channel state information (CSI); andreceive uplink control information (UCI) including the multiple CSIusing a PUCCH resource based on power for the transmission of the UCI,wherein the PUCCH resource for receiving the UCI including the multipleCSI is identified among the one or more PUCCH resources, based on anumber of bits for the UCI, and wherein the power for the transmissionof the UCI is identified based on a number of physical resource blocks(PRBs) corresponding to the PUCCH resource and the number of bits forthe UCI.
 17. The base station of claim 16, wherein the configurationinformation includes an index and a format for each of the one or morePUCCH resources.
 18. The base station of claim 16, wherein the PUCCHresource is identified as a PUCCH resource corresponding to a number ofbits which is smallest number being greater than or equal to the numberof bits for the UCI among the one or more PUCCH resources.
 19. The basestation of claim 16, wherein the controller is further configured toreceive the UCI including a selected at least one CSI using a PUCCHresource corresponding to the greatest number of bits, wherein the atleast one CSI is selected among the multiple CSI based on a priorityvalue, in case that the number of bits for the UC is greater than thegreatest number of bits corresponding to the one or more PUCCH resources20. The base station of claim 16, wherein the power for the transmissionof the UCI is identified based on a ratio of the number of bits for theUCI and a number of resource elements for the UCI.